Table slide



Apxil 26,1"927,` 1,626,189

' H. H. DREW TABLE SLIDE Filed Nov. 10. 1924 Herbal-LH -D1-'ew .n f

Patented Apr. 2, 1927.

entren STATES PATENT ori-ics HERBERT H. DREW, 0F WATERTOW N WISCONSIN,ASSIGNOR TO WATERTOWN TABLE- SLIDE CO., OF WATERTOWN, WISCONSIN.

TABLE SLIDE.

Application :filed November 1(7), 1924. Serial No. 748,957.

This invention relates to extension table slides.

Table slides having three slideelements have been constructed heretoforeto provide for the simultaneous motion of the slide members, but whereit is necessary to provide greater extension or vgreater number` ofslide members, this construction has not been satisfactory. 'Attemptsmade to provide more than three slide members involved the use oflatches and other devices for temporarily locking pairs of slidestogether. This expedient necessitated careful attention on the part ofthe operator and required additional mechanism which rendered the deviceon thek one `hand unattractive to a prospect-ive purchaser and on theother hand' expensive to manufacture.

This invention is designed to overcome.-

the above noted defects, and objects of such invention are to provide anextension table slide having more than three slide elements and to sorelate the elements that motion of of one will cause simultaneous motionof all of the elements and to secure this desirable result Withoutemploying latches or other expensive and undesirable mechanism, but toprovide such mechanism as will relieve the operator of all thought oreffort or special manipulations when extension is desired.

Further objects are to provide an eXtension slide construction in whichthe surfaces are flat and free from projections, which is highlydesirable in slide construction, in which rack and pinions are employedin a novel and effective manner to secure the simultaneous relativemotion of all of the members, and in which the pinions are held againstlateral disengagement from the racks although wear may occur between theslide members.

Further objects are to provide an extension slide construction in whichthe retaining screws are so positioned, due to the construction of rackand pinion, that they may enter a material and relatively large body ofthe wood forming the slide members, and are not positioned in a weakenedeasily split portion as has heretofore been the practice.

Further objects are to provide an extension table slide which is oflight construction although strong and durable, and which may be cheaplyand readily produced.

An embodiment of the invention is shown in the accompanying drawing, inwhich Figure l is a plan view of one of the slides showing it extended.

Figure 2 is a similar View showing the slide contracted.

Figure 3 is an enlarged transverse sectional view on the line SH3 ofFigure 2.

Figure 4 is a view ottone of the racks removed rom other portions or theapparatus.

Referring to the drawings, it will bev seen that a central slide member1 is rigidly secured to the stationary portion or pedestal portion ofthe table. A pair of outer slide members 2 are provided and a pair ofintermediate slide inembers are positioned between the outer slidemembers 2 and the center slide members l. These several slide membersmay be connected in Vany suitable manner as by means of the blocks 4 androllers 5 so as tohold them in inner engaging relation and vyet permittheir free slidmg. f

vention contemplates the use of a central fixed slide member with twoassociated pairs of slide elements, each pair of slide elements havingan outer slide member 2 and an intermediate slide member 3. These groupsof slide members are connected by means of a pinion 6 set into a recess7 in the central slide member l (see Figure 3) and a pair of racks 8carried by the intermediate slide members 3. Thus motion of either groupof slide members will cause simultaneous motion in the oppositedirection of the other group. The pinion and racks, it will be noted arepreferably positioned adjacentthe lower side of the central andintermediate members although, obviously, they might be positioned onthe upper side with similar reversal of mechanism hereinafter to bedescribed. Each group comprises, as stated, an outer slide member 2, andan .intermediate slide member 3. The intermediate slide member 3 in eachcase is provided with a pinion 9 which meshes with a rack lO carried bythe outer slide member 2 and with rack ll carried by the central slidememer l.

It will be noted from Figure 3 that the racks l0 and ll and the pinions9 are positioned adjacent the upper face of the slide It is to be notedat this point that the inl members, so as to avoid interference with theraclr and pinion construction carried adljacent the lower iiaces ot thecentral and intermediate members, as previously described. lt is to benoted further that the pinions 9 arefeach set in recesses lf2 former inthe intermediate members 3 .so as to prevent the formation ot projectingobstructions upon the faces of the slide members.

Suitable stops, such as the pins 13, may be provided in the usual mannerfor limiting the inward motion ot the slide members.

ylhe racks are ot identical construction and one of the racks, forinstance the rack l() has been shown in defail in Figure 4. lt will benoted from this ligure that the rack consists-of a'metal strip having` aplurality et punched holes lil which provide intermediate bars l5 wiichact as the teeth et theraelr. By this construction a continuous upperand lower marginal edge is provided i'or each ot ine racks anddisengagement ot the pinons laterally 'from the racks is whollypreventedfeven when wear has occurred between the individual slidemembers.

These vracks are provided with smaller apertures 16 adapted to receiveattaching,` screws, `as shown in Figure 8, and such racks are preferablyinset in the corresponding verticall taees'o the slide members. rlhisconstruction provides a secure backing for each ofthe raclrs and permitsthe raclr being formed of thin cheap material as the bars vl5 are,reeniorced by the continuous marginal portionso'l the racks and as theracks themselves are adequately backed by the slide members.

It will be seen that an extension slide construction has been providedwhich permits the use or a large number of slide membersin excess o'tlthat heretofore suc cesstully'employed, and which is provided withextremely simple and durable mechaA nism insuringsimultaneous motion ofall ot the members.

It will 'further be seen that a very cheap and easily producedconstruction has been provided although the construction is eminentlyellective in operation, and Ait is to be noted further that noprojections or obstructions are provided on the upper and lower Ylfaeesof the slides.

Although the invention has been described Ain considerable detail, it isto be understood that the invention may be variously embodied and is,therefore, to be limited only as claimed.

l claim:

l. An extension table slide comprising a central member having` racksSecured to its vertical faces adjacent one side andhaving a pinionsecured te its other side, a pair of outer members each having a raclrsecured to a vertical face adjacent one side, anda pair of inermediatemembers located between said outer members and said central member andhaving pinions meshing with the racks on said outer and central membersaii cl li"av ing racks meshing,` with the pinion carried by said centralmember.

2. 'An extension tableslide comprising a central relatively stationarymember, 'a pinion secured to the under side fof ysaid member with itsaxis'passi'ng through such member, a pair or' intermediate members eachhaving racks on a face towards said Jcentral member and meshing withsaidp inn a pair of outer members 'assoeiatedwith intermediate members, saidcentral member having` racks on opposites, sides eieot and adjacent theupper side'o said central member, said outer members having racks'facing the second mentioned racks, and

pinionscarriedby said intermediate members and meshing with said secondand third mentioned Aracks vand 'located on the upper side of saidintermediate member.

ln testimony'that claim the foregoing l have hereunto set my hand atilli/iatertown, in the county ot Jefferson and State ot lTisconsin.

HERBERT H. Dam/v.

